Title: DTC-SVM-based position regulation of an induction motor: a comparison between different strategies

Authors: Fatma Ben Salem

Addresses: Sfax Engineering School, University of Sfax, Sfax, Tunisia

Abstract: This work is aimed at looking into potential advantages of direct torque control (DTC) strategies for position regulation applications. Of particular interest is the capability exhibited by DTC strategies to develop the maximum torque at standstill. Within this background, the paper is devoted to the presentation of a comparison study between three DTC strategies dedicated to position control of an induction motor, such that: 1) the basic DTC strategy; 2) the DTC strategy with a look-up table including only active voltage vectors; 3) the DTC-SVM strategy with hysteresis controllers and imposed commutation frequency. Following simulation works, it has been found that the third strategy offers the lower torque ripples. Furthermore, it exhibits a high capability to reject the demagnetisation problem which penalises the stator flux regulation at low speeds in the Takahashi basic strategy. However, the DTC-SVM requires a control system with higher CPU frequencies in such a way its implementation scheme is more complex than the basic DTC strategy.

Keywords: induction motors; direct torque control; DTC; position control; space vector PWM; pulse width modulation; SVPWM; space vector modulation; demagnetisation; torque ripples; imposed commutation frequency; hysteresis control.

DOI: 10.1504/IJMIC.2015.069942

International Journal of Modelling, Identification and Control, 2015 Vol.23 No.3, pp.213 - 221

Published online: 16 Jun 2015 *

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